Even if global warming isn't a man made problem, reducing pollution cant hurt.
Just look at the mess China is in, not looking forward to wearing a gas mask when going out the door:
http://www.theatlantic.com/infocus/2013/01/chinas-toxic-sky/100449/

There are some companies who are making an effort to reduce CO2 emissions, like Apple which uses a lot of renewable power for its datacenters.
Something not everyone is too happy about: http://mashable.com/2014/02/28/apple-ceo-tim-cook-climate-change/

Personally I think the technology that comes out of the sustainability problem is amazing, like this concept car that runs on salt water:

http://www.nanoflowcell.com/